vselectnodes.cpp

/* This file is part of the KDE project
   Copyright (C) 2002, The Karbon Developers
 
   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public
   License as published by the Free Software Foundation; either
   version 2 of the License, or (at your option) any later version.
 
   This library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Library General Public License for more details.
 
   You should have received a copy of the GNU Library General Public License
   along with this library; see the file COPYING.LIB.  If not, write to
   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
*/
 
 
#include "vpath.h"
#include "vsegment.h"
#include "vselectnodes.h"
#include "vlayer.h"
#include "vdocument.h"
 
void
VSelectNodes::visitVSubpath( VSubpath& path )
{
    path.first();
 
    VSegment *curr = path.current();
 
    while( curr )
    {
        if( m_rect.isEmpty() )
        {
            for( int i = 0; i < curr->degree(); i++ )
                curr->selectPoint( i, m_select );
 
            setSuccess();
        }
        else
        {
            if( m_exclusive )
            {
                // we are in exclusive mode, so deselect all nodes first
                for( int i = 0; i < curr->degree(); i++ )
                    curr->selectPoint( i, false );
            }
 
            if( curr->isCurve() )
            {
                // select all control points inside the selection rect
                for( int i = 0; i < curr->degree()-1; ++i )
                {
                    if( m_rect.contains( curr->point( i ) ) )
                    {
                        curr->selectPoint( i, m_select );
                        setSuccess();
                    }
                }
                VSegment* prev = curr->prev();
                // make sure the last control point of the previous segment and the first control point
                // of the current segment are selected if:
                // - both segments are curves with a smooth transition and
                // - the previous segment's knot is selected or
                // - one of the above mentioned control points is already selected
                if( prev )
                {
                    if( curr->pointIsSelected( 0 ) == m_select )
                    {
                        if( prev->isCurve() && prev->isSmooth() )
                            prev->selectPoint( prev->degree()-2, m_select );
                    }
                    else
                    {
                        if( prev->knotIsSelected() || ( prev->isCurve() && prev->isSmooth() && prev->pointIsSelected( prev->degree()-2 ) ) )
                            curr->selectPoint( 0, m_select );
                    }
                }
            }   
 
            if( m_rect.contains( curr->knot() ) )
            {
                curr->selectKnot( m_select );
                // select the last control point before the knot, if segment is curve
                if( curr->isCurve() && m_select )
                    curr->selectPoint( curr->degree()-2 );
 
                setSuccess();
            }
        }
        curr = curr->next();
    }
    // select first node as well
    if( path.isClosed() && path.getLast()->knotIsSelected() )
        path.getFirst()->selectKnot( m_select );
}
 
void
VSelectNodes::visitVLayer( VLayer& layer )
{
    VDocument* doc = (VDocument*)layer.parent();
    if ( ( layer.state() != VObject::deleted ) &&
         ( ( doc->selectionMode() == VDocument::AllLayers ) ||
           ( doc->selectionMode() == VDocument::VisibleLayers && ( layer.state() == VObject::normal || layer.state() == VObject::normal_locked ) ) ||
           ( doc->selectionMode() == VDocument::SelectedLayers && layer.selected() ) ||
           ( doc->selectionMode() == VDocument::ActiveLayer && doc->activeLayer() == &layer ) ) )
    {
        VObjectListIterator itr( layer.objects() );
        for( ; itr.current(); ++itr )
            itr.current()->accept( *this );
    }
}
 
void
VTestNodes::visitVSubpath( VSubpath& path )
{
    path.first();
 
    while( path.current() )
    {
        for( int i = 0; i < path.current()->degree(); i++ )
            if( m_rect.contains( path.current()->point( i ) ) ) //&&
              //path.current()->pointIsSelected( i ) )
            {
                m_segments.append( path.current() );
                setSuccess();
                // only add a segment once
                break;
            }
 
        path.next();
    }
}
 
void
VTestNodes::visitVLayer( VLayer& layer )
{
    VDocument* doc = (VDocument*)layer.parent();
    if ( ( layer.state() != VObject::deleted ) &&
         ( ( doc->selectionMode() == VDocument::AllLayers ) ||
           ( doc->selectionMode() == VDocument::VisibleLayers && ( layer.state() == VObject::normal || layer.state() == VObject::normal_locked ) ) ||
           ( doc->selectionMode() == VDocument::SelectedLayers && layer.selected() ) ||
           ( doc->selectionMode() == VDocument::ActiveLayer && doc->activeLayer() == &layer ) ) )
    {
        VObjectListIterator itr( layer.objects() );
        for( ; itr.current(); ++itr )
            itr.current()->accept( *this );
    }
}